| Tuscaloosa to Oberkirch | 4,775.16 mi (7,684.87 km) |
| Tuscaloosa to Obernburg am Main | 4,776.53 mi (7,687.08 km) |
| Tuscaloosa to Obernkirchen | 4,700.00 mi (7,563.91 km) |
| Tuscaloosa to Oberschleissheim | 4,925.29 mi (7,926.49 km) |
| Tuscaloosa to Oberstdorf | 4,901.24 mi (7,887.78 km) |
| Tuscaloosa to Obertraubling | 4,924.91 mi (7,925.88 km) |
| Tuscaloosa to Obertshausen | 4,757.20 mi (7,655.98 km) |
| Tuscaloosa to Oberursel | 4,742.81 mi (7,632.81 km) |
| Tuscaloosa to Ochsenfurt | 4,819.23 mi (7,755.80 km) |
| Tuscaloosa to Ochsenhausen | 4,865.86 mi (7,830.84 km) |
| Tuscaloosa to Ochtrup | 4,628.35 mi (7,448.61 km) |
| Tuscaloosa to Odenthal | 4,660.09 mi (7,499.69 km) |
| Tuscaloosa to Oelde | 4,676.25 mi (7,525.70 km) |
| Tuscaloosa to Oelsnitz | 4,875.90 mi (7,847.01 km) |
| Tuscaloosa to Oer-Erkenschwick | 4,647.26 mi (7,479.05 km) |
